Artificial board



(No Model.) f

. J.A E. EATON.

ARTIFICIAL BOARD.

No. 491,992. Patented Peb. 7, 1893.

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UNITED STATES PATENT OFFICE.

JAMES EMERY EATON, OF UTICA, NEW YORK.

ARTIFICIAL BOARD.

SPECIFICATION forming part of Letters Patent No.491,092, dated February 7, 1893.

v Application led July 16. 1892. Serial No. 440,189. (No model.)

To all whom it may concern.- Be it known that I, JAMES EMERY EATON, of Utica, in the county of Oneida and State of New York, have invented certain new and useful Improvements in Artificial Boards; and Ido hereby declare the following to be afull, clear, and exact description-of the invention, such as will enable others skilled in the art to which it pertains to Inake and use the same. My invention relates to an artificial board composed of several layers of straw-board or iibrousvegetable material united by cementation and under considerable pressure, the object being to produce a board more especially adapted for book bindings,-a board that is cheap and durable, and not liable-to warp.

In the accompanying drawings, Figures l .and 2 are transverse sections of artificial boards embodying my invention, the board` shown in Fig. 1 being composed of five layers A ofrnIaterial and that shown in Fig. 2, being composed of seven layers.

My improved artificial board is preferably composed of several layers of straw-board or fibrous vegetable. material with two or more of the intermediate layers saturated with a hardening composition, such, for instance, as

a composition *of resin, pitch or tar, and linseed oil. A suitable hardening composition caribe madeby'taking of pitch six pounds Ato one hundred parts of water, and of alum `ten parts to one hundred parts of water; first,

thoroughly saturating the sheets or layersof material with the gelatine size, and after drying, passing the sheets or layers through a bath of the alum solution. A layer of unsaturated material is interposed between the layers saturated with the hardening composition. Unsaturated material is also employed for the outer layers, so that paste, glue or cement will readily adhere thereto in cover-l ing the same with paper or cloth as for bookbinding. l

In Fig. 1 is shown a board composed of tive layers, the central and outer layers, or, being unsaturated, while the intervening layers, b, are saturated with a hardening composition.

In Fig. 2 is shown a board composed of seven I t layers arranged as hereinbefore indicated,-

namely, alayer b saturated with a hardening composition being interposed between the layers a of unsaturated material, and unsaturated material being employed for the outerlayers.

The layers of material are united by cementation and when assembled as hereinbefore indicated, they are placed between twoY position, and an unsaturated layer being inf terposed between said hardened layers, and unsaturated material composing the outer layers, substantially as and for the purpose set forth.

In testimony whereof I sign this speciica- 4 tion, in the presence of two witnesses, this 1st day of July, 1892. 5

J. EMERY EATON. Witnesses:

ANNA E. JONES, C. D. ADAMS. y 

